Yes, all fish have fins.
Fins are a defining characteristic of fish. As vertebrates adapted for aquatic life, fish use fins for a variety of purposes, including:
- Propulsion: Moving through the water.
- Steering: Changing direction.
- Stabilization: Maintaining balance.
- Braking: Slowing down.
While the shape, size, and placement of fins can vary greatly among different species of fish, all fish possess at least some form of fins. These adaptations are crucial for their survival in aquatic environments.